During routine morphological and cytogenetic studies in the seed progeny of Allium tuberosum, an abnormal plant with high flower abortion in some inflorescences was noticed. Detailed somatic and meiotic studies revealed that although this plant possessed the normal chromosome complement (2n=4x=32), the PMCs in three inflorescences had varying number of chromosomes. While 67.77% PMCs scored had normal chromosome constitution, the number ranged from 8 - 33 in 32.22 % cells. Besides describing this anomaly in detail, the mechanisms likely
to be responsible for the same are also discussed.